Valerie Mattis had just finished lunch and a break filled with gospel music inside her Ford Fiesta during a brief respite from her job at Walmart on Gatlin Boulevard when a young man appeared at her window.

"I heard, 'Get out of the car,'" said Mattis, adding that a teenager was holding a gun to her face.

Mattis said she went to reach for her cellphone and the gunman told her to leave without it. The devout grandmother said she walked away from the car, almost certain she would be shot in the back.

"He was very rough, very rough," said her husband, Aston Mattis. "She could remember that he was a child, literally, because that's what she told me, 'He's just a little kid.'"

Saturday, police in Palm Beach County arrested Akeem Rivers, 16, on carjacking charges. Mattis' Ford was found not long after the Jan. 3 carjacking. Port St. Lucie police Master Sgt. Frank Sabol said Rivers' brother was in the car when it was pulled over.

Mattis said she's relieved to have her car back and to have the teenager behind bars.

Diplomats and negotiators kept working Tuesday as a deadline approached to reach a deal on a framework agreement on Iran's nuclear program, but a U.S. State Department official said the discussion may continue after the cutoff.